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<h1>Zinc selenide, ZnSe</h1>

Zinc selenide (ZnSe) is a binary compound semiconductor with a cubic zinc blende structure. This material is transparent in the visible and near-infrared regions of the electromagnetic spectrum, with a wide direct bandgap of approximately 2.7 eV. Due to its transparency and high refractive index, ZnSe has become a popular choice for high-power infrared laser systems, especially CO<sub>2</sub> lasers, where ZnSe optics are used as output couplers and beam expanders. ZnSe can also be doped with various elements, most notably with chromium (Cr:ZnSe), to produce mid-infrared solid-state lasers. In addition, ZnSe is utilized in the fabrication of light-emitting diodes, photodetectors, and solar cells.

<h2>External links</h2>
<ul>
<li><a href="https://en.wikipedia.org/wiki/Zinc_selenide">Zinc Selenide - Wikipedia</a></li>
<li><a href="https://www.webelements.com/compounds/zinc/zinc_selenide.html">Zinc Selenide - WebElements</a></li>
<li><a href="http://www.reading.ac.uk/infrared/library/infraredmaterials/ir-infraredmaterials-znse.aspx">Zinc Selenide - Infrared Multilayer Laboratory, University of Reading</a></li>
<li><a href="http://www.iiviinfrared.com/zinc_selenide_znse">Zinc Selenide - II-VI Infrared</a></li>
<li><a href="http://www.internationalcrystal.net/iclsite3/optics_18.htm">Zinc Selenide - ICL</a></li>
<li><a href="http://www.crystran.co.uk/optical-materials/zinc-selenide-znse">Zinc Selenide - Crystran</a></li>
</ul>
